Improvement in thrashing-machines



`1. sMlT'H.

L ThrashingfMaphnes. y N0. 144,814. Y Patented Nov. 25,1873.4

WITNESS'ES. f, INYENTOF;

UNITED STATES PATENT OFFICE.

JOHN SMITH, OF BURLINGTON, WISCONSIN.

IMPROVEMENT IN THRASHlNG-MACHINES.

Specitieation-forming part of Letters Pnt ent No. 144,874, dated Novemhcr, 1873; application tiled Juiy 29, 1872.

.To all ulzom 'it may concern:

Be it known that I, JOHN SMITH, oi' Burlington, in the county ot Racine and the State of \\'isconsin, have invented certain Improvements in Thrasher and (Hain-Separator, ot' which the following is a specitcation:

The object ot' my invention is to produce a machine which will thrash grain to a greater advantage than heretofore; and consists in the use of a long stationary sieve, having upright projections or teeth arranged in relation to the thrashing-cylinder and carriers or conveyers, as more particularly hereinafter described by the description and drawings making a part ot' this speciiieation, in which Figure l is a perspective view ot' my machine. Fig. 2 is a vertical sectional view. Fig. 3 is a detached view of a modiiication of the sieve. Fig. et is a detached view ot' the sieve.

In the said drawings, A is the body oi' the machine, in which are arranged, in the inanner shown, the fan B; thrashing-cylinder C; the toothed wheel I), which carries the straw from the cylinder to the straw-conveyer; the grain-conveyer O sieves K L; elevator M, and strawcouveyer P, all operated by suitable cogs and rollers in the usual manner. Just below the straw-convcyer P I locate a long stationary sieve, Q, which has projecting from its surface, upwardly, teeth i, which rake in the direction ofthe travel of the straw-conveyer, and are located alternately along between thc rectan gulariaeshes, as seelLlLFg- 4- .Hf Fig. 5 is a niodiiica'tion ot' the sieve, show! `in the teeth only slightly raking.

' This sieve has large rectangular openings or meshes s in it, and by its location and construction, the teeth on the straw-conveyer passing between the teeth 011 the sieve, a more thorough and positive agitation of the straw4 

